Image forming apparatus and method

Details Image forming apparatus and method Image forming apparatus and method

1987-10-30

1989-08-29

Braun, Fred L.

Photocopying

Contact printing

Light boxes

118657, G03G 1508

Patent

active

048622133

ABSTRACT:
An image forming apparatus utilizing two types of toners. The first toner is of a type that causes the charge thereon to increase over time, while the second toner is a type in which the charge decreases over time. The storage chamber for the apparatus holds a two-component developing agent formed of a carrier and a first toner. In proportion to the consumption of the first toner during the printing process, the second toner is resupplied from a toner hopper to the developing agent in the storage chamber.

REFERENCES:
patent: 3954331 (1976-05-01), Smith
patent: 4226525 (1980-10-01), Sakamoto et al.
patent: 4235194 (1980-11-01), Wada et al.
patent: 4331757 (1982-05-01), Tanaka et al.
patent: 4382420 (1983-05-01), Ohnuma et al.
patent: 4485760 (1984-12-01), Tanaka et al.

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